You’ve done most of the tests I have in mind for this situation.
Can you make sure that the wires of the large power plug are pushed in and making contact?
A little back story - we’ve had a few cases (roughly 1% of boards) where the optoisolator component that fires the laser isn’t working properly.
However, with the last 3 people that had a similar issue and were adamant that their board was bad in this way, we replaced their boards and it turned out that this was not the issue.
Given that you are located internationally, and all the current concerns with international shipping, we want to make sure to fully diagnose the issue and reach a proper resolution. (And of course given the laws of chaos, things will turn out in the most “fun” way possible. Of course.)
It’s also worth noting that there are a number of other ways that we can wire up your Laser PSU to the LaserBoard to get it to fire.
Can you make sure that the wires of the large power plug are pushed in and making contact.
I’d start by checking this - they get loose a lot.